Robust passive autofocus system for mobile phone camera applications

被引：8
|
作者：
Xu, Xin [1 ]
Zhang, Xiaolong
Fu, Haidong
Chen, Li
Zhang, Hong
Fu, Xiaowei
机构：
[1] Wuhan Univ Sci & Technol, Sch Comp Sci & Technol, Wuhan 430081, Peoples R China
来源：
COMPUTERS & ELECTRICAL ENGINEERING | 2014年 / 40卷 / 04期
关键词：
REAL-TIME IMPLEMENTATION; FOCUS MEASURE; ALGORITHM;
D O I：
10.1016/j.compeleceng.2013.11.019
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A robust autofocus system is a ubiquitous function in today's mobile phone camera applications. However, due to the power consumption and size requirements, it is difficult for the autofocus function to be implemented into the design of mobile phone cameras. This paper presents a passive autofocus system with low computational complexity. This system uses a novel contrast measurement to determine degree of image sharpness, which can better reflect the information about image discontinuities. In order to gauge the performance of this measurement, a modified peak search strategy is used in the experiments. The experimental results from several typical image sequences validate the effectiveness of the proposed method. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1353 / 1362
页数：10
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